Squamous Cell Carcinoma
Squamous cell carcinoma affects cells in the middle layer of the epidermis. It is typically more aggressive than basal cell carcinoma. It appears as red, scaly, and rough skin lesions, typically on sun-exposed areas such as the hands, head, neck, lips, and ears. Similar red patches may be squamous cell carcinoma in situ (Bowen’s disease), the earliest form of squamous cell cancer.
read more…
http://en.wikipedia.org/wiki/Squamous-cell_carcinoma